📢 PsyArXiv 12 Days of Christmas 🎄 🧑‍🎄 🎁 PsyArXiv moderators will be taking a holiday break from Dec 24 to Jan 4. Please avoid uploading work to the archive during this time to prevent a backlog, and expect some delays in moderation. We aim to clear any holiday backlog by Jan 16. Happy Holidays!

Work (also) with me! Two years postdoc in the @weaponisedpasts.bsky.social project, based in Edinburgh. Will do transmission chain experiments to understand the spread of heritage-based hostility, online and elsewhere. More info ⬇️⬇️⬇️

Another awesome paper led by a PhD student I am supervising. Facial femininity predicts jealousy in women, with the effect being stronger among heterosexual women. www.nature.com/articles/s41...

The United Kingdom is coming back to Erasmus+ 🇪🇺🇬🇧 We have concluded negotiations for the United Kingdom’s association to Erasmus+ in 2027, making further steps in our renewed EU-UK Strategic Partnership. More ↓ link.europa.eu/vf3vJk

Christmas has come early for those interested in sexual orientation data! 🎅📊 The Office for National Statistics has just released new sexual orientation data from the 2024 Annual Population Survey – and the story is one where the proportion of queer people in the UK continues to grow! 🧵

📚 New in Human Ethology: Only 1 in 4 indexed names in evolutionary psychology textbooks are women. This study maps gender representation across major textbooks and highlights ways to improve inclusion. 🔗 doi.org/10.22330/001... #HumanEthology #GenderBias #WomenInScience

📣 One week left to apply to our Toulouse Summer School in Quantitative Social Sciences! We have an exciting program for this year: www.tse-fr.eu/sites/defaul... 🗓️ May 26 to June 19, 2026 📍 Toulouse Application deadline: December 15 Apply here: www.tse-fr.eu/toulouse-sum... @tse-fr.eu @iast.fr

🚨 DEADLINE 🚨 EHBEA is searching for people who wants to help in the development of the evolutionary human sciences 👀 Do you feel like it? Then apply for PRESIDENT and/or SECRETARY for 2026-2029! Deadline? December 16/12/2025 More information?👇 👇 👇

Andy Conway and I are honored to serve as inaugural co-Editors of this new Psychonomics journal, focused on the rigorous study of individual differences in cognition. Please spread the word to potentially interested colleagues; we hope that you will send us your best relevant work!

I fully agree that a fully standardized effect size can often be a bad criterion for dismissing an effect. But somehow, instead of choosing more sensible metrics for evaluation, psychologists tend to conclude that hence any “significant” effect is potentially very important.

Applications are open for the 2026 Owen Aldis Award from ISHE at ishe.org/awards/. Support for innovative, observational, ethological research on human behavior: up to $8,000, plus membership and conference benefits. Deadline: 19 Jan 2026. Open to students worldwide!

Are you interested in doing a PhD about what humans infer about animal minds? Check out this opportunity @northumbriapsy.bsky.social with me, @mdconstable.bsky.social and Lee Shepherd! Deadline 23 Jan 2026 www.findaphd.com/phds/project...

Methodology

We're hiring a postdoc, to be based at Arizona State University, to research the PSYCHOLOGY OF ANTISEMITISM. Start date as early as Jan-12-25. Email for questions. Details: apply.interfolio.com/177756

🚨 ABSTRACT SUBMISSION 🚨 #EHBEA2026 will be held in Leiden! Do not forget to submit your abstract before December 15th in order to attend and share your research! More in the official account: @ehbea2026.bsky.social 👇👇👇

Coding Club: Creating an R Package by Lisa DeBruine #RStats https://bigbookofr.com/chapters/package%20development.html#coding-club-creating-an-r-package

Born #OnThisDay in 1867 was Marie Skłodowska–Curie, the first woman to win a Nobel Prize, the only woman to win twice and the only person to win a Nobel Prize in two disciplines: Physics for her work on radioactivity, and Chemistry for her discovery of radium and polonium. #WomenInSTEM

The package formerly known as papercheck has changed its name to metacheck! We're checking more than just papers, with functions to assess OSF projects, github repos, and AsPredicted pre-registrations, with more being developed all the time. scienceverse.github.io/metacheck/

Leiden looking good today ;-) 📢 Abstract submission will be open Nov 1st – Dec 15th for EHBEA 2026 ⚡Present your research, connect & collaborate 14-17 April 📝 300 words (extendable to 800 after acceptance) For more information & our full call for abstracts, check www.ehbea2026.com

New preprint w/ @fbartos.bsky.social , Ben Jones, and @tvpollet.bsky.social . Our reanalyses found *little* evidence that sexual orientation is associated with 2D:4D ratios after accounting for publication bias. 🧵1/7 osf.io/preprints/ps...

That’s insane. Better trying Euromillions jackpot tomorrow (£45M).

New paper out today with Zhian Chen. We argue that modern intensive parenting is not only exhausting for parents, but in some cases disrupts healthy child development. What is 'overparenting'? And can evolutionary theory help us understand how we got here? academic.oup.com/emph/advance...

🚨 AWARD ANNOUNCEMENT 🚨 For the first time, EHBEA is giving an award for this members who excel in public outreach and communication of the evolutionary human sciences 📣 📣 📣 Deadline: December 19, 2025 Check the form below 👇 docs.google.com/document/d/1...

We're psyched to discuss all things disgust in our upcoming conference on Disgust Across Borders! 🦠 Our 2nd (online) keynote is Paul Rozin who will address a fundamental question in Disgustology: "Is disgust a unitary emotion?" 📍 @iast.fr Toulouse 🇫🇷 | Dec 4–5 👀 Stay tuned at tinyurl.com/2tprm9cn!

This is quite interesting.

EHBEA is looking for new PRESIDENT and SECRETARY for 2026-2029! 👀 If you know of anybody who could represent EHBEA, nominate them as president! If you know with good organisational skills, nominate them as secretary! DEADLINE: 16/12/2026 HERE IS THE FORM 👇 docs.google.com/document/d/1...

🌙 We’re looking for young people (18–24) in the UK to take part in a study on sleep, self-harm & daily life. 📱The study involves 2 weeks of short surveys + an optional interview More information in poster or contact me at [email protected]

😢 www.bbc.co.uk/news/live/c9...

A serious failure case is that many biologists seem to have been taught that they should inspect bivariate correlations between predictors and not include pairs with high correlations. That is not even "collinearity" as statisticians define it (where is about joint info in additive model).

Standing up for science is one way to push back against political attacks on the university sector 👇 Experts in biology and anthropology have put together this statement to counter misinformation about race. Please consider signing and sharing

It must be real if it's on jobs.ac.uk...! www.jobs.ac.uk/job/DOQ976/p...

@durhampsych.bsky.social current has 5 (FIVE!!) PhD studentships being advertised! 3 to work with me on children as agents of cultural evolution 2 to work with @drboothroyd.bsky.social on examining school-based body image interventions. Please share and apply! www.durham.ac.uk/departments/...

New blog post! Why experiments are the gold standard for answering causal questions (pedermisager.org/blog/why-exp...). Many text books insist on experimental evidence to draw causal inferences bvut don't fully explain exactly what gives experiments their special powers.

Online dating lets us meet a more diverse range of potential partners, but we still tend to be drawn to people like ourselves. My latest @psychologytoday.com post explores why: www.psychologytoday.com/us/blog/digi...

A Registered Report of 7,978 people in 20 countries by @cmolho.bsky.social et al finds that decision-makers willfully ignore inconvenient information. Information about the negative consequences drives prosociality, especially among guilt-prone individuals. www.nature.com/articles/s41...

Do you study cooperation and how it varies across societies, including those that are under-represented? Are you interested in how AI is fundamentally reshaping human cooperation? If so, don’t miss our special issue on Current Directions in Social Dilemmas Research

📣 We are excited (or should we say disgusted?) to announce the conference 'Disgust across borders' at IAST! @iast.fr 🗓️ Join us on Dec 4 & 5 for two days full of disgust research across species and disciplines. Registration and abstract submission are open (until Aug 31): forms.gle/QBmkUB3aLDjY...

New paper authored by a PhD student I’ve been supervising. www.nature.com/articles/s41...

@juliastern.bsky.social has always been a star to me. I’m lucky to have her as both an amazing collaborator and friend.

🚨 Big milestone for Rdatasets 🚨 The web archive now hosts 3400+ free and documented CSV datasets. Fantastic for teaching and testing! And {Rdatasets} is a new #RStats 📦 for easy download and search Web archive: vincentarelbundock.github.io/Rdatasets R 📦: vincentarelbundock.github.io/Rdatasetspkg

INFORMATION FOR EHBEA MEMBERS We’re collecting feedback on the Newcastle 2025 meeting (@ehbea2025.bsky.social). Check your email (and spam folder!) for the survey link, and don’t forget to fill it out 🙏 Didn’t get it? Reach out to Jeanne Bovet 😊 🔗 www.northumbria.ac.uk/about-us/our...

The Modern R Stack for Production AI: doi.org/10.59350/z9f... Python isn't the only game in town anymore: R can interact with local and cloud LLM APIs, inspect and modify your local R environment and files, implement RAG, computer vision, NLP, evals, & much more #Rstats

Happy 18th birthday ggplot2! #rstats

Join me at the University of Witten/Herdecke for research on meta scientific topics, replication work or other fun things :-) as well as teaching some IMO wonderful students short.sg/j/56902143

Big Five personality differences by Zodiac sign (N = 324,929). Eta sq are all less than .0008, so less than 0.1% of the variance in personality is explained by Zodiac sign.

Coding Club: Creating an R Package by Lisa DeBruine #RStats https://bigbookofr.com/chapters/package%20development.html#coding-club-creating-an-r-package

In recognition of #MenstrualHealthAwarenessDay, we are pleased to highlight periodically.bsky.social, who address the stigma surrounding menstruation in science through open dialogue, examining the impact of menstrual health on students and researchers:

Happening in two days! Register here ⬇️

Please share! 💛 Looking for young people aged 16–24 with lived experience of self-harm. See poster for details on the co-design project. ✨ Interested or want to learn more? Get in touch: [email protected]